Improvement in locks for doors



A. GULDFING'ER.

Lock for Doors.

IJVVENTOR ai @fa/e6 .Attorney NAPETERS, PHOTO um UNITED STATES PATENTEric.

ADOLPH GOLDFINGER, OF NEWARK, NEW JERSEY.

IMPROVEMENT IN LOCKS FOR DOORS'.

Specification forming part of Letters Patent No. 165,995, dated July27,1875; application lled June 24, 1875.

To all whom t may concern:

Be it known that l, ADOLPH GoLDFiNGEE,

of the city of Newark', in the county of Essex and State of New Jersey,have invented certain new and useful Improvements in Locks; and I dohereby declare that the following is a full, clear, and' exactdescription thereof,

which will enable others skilled in the art to which it pertains to makeand use the same, reference bein g had to the accompanyingdrawing, andto the letters of reference marked thereon, which forma part of thisspecification.

The object of my' invention is to provide a i lock combining in itsconstruction and opera' tion simplicity, strength, and durability; and

it consists in the combined arrangement of a plate having a flangeprovided with lugs,

which iit into corresponding sized slots in the bolt, said plate andbolt being also provided i with projecting feet at their base, all aswill be hereinafter more fully described, and

'pointed out in the claim.

vided with projecting lugs a, as shown in Fig.

3, which are adapted to tit into corresponding slots or grooves b in theupper edge of the bolt D, as shown in Fig. 4, a suitable spring, c,intervening between the flange G and the upper part of the lock-case,which is designed to keep the lugs a on the said flange in gear with thegrooves b in the bolt D, so as to prevent the bolt from slipping unlessactuated by f a suitable key. A guide-pin, d, projects from the side ofthe loclccase, through a slot in the bolt D, upon the end of which isattached a flat spring, e, which is sunk in a groove in the face of thebolt, and acts as a clamp to prevent the back end of the bolt Dfromwtilting when pressure is brought to bear upon the outer end of saidbolt D. The lower part of the plate A is curved, and terminates in thetwo arms f and g, as shown, as also is the lower portion of the bolt D,terminating with two arms, h and z'.

The lock is operated as follows: The key, being inserted and turned inthe direction to force the bolt outward, rst comes incontact 1 with theend of the arm g, forcing the plate A upward as the key is turned, untilthe lugs i a are disengaged from the slots b, when the key engages withthe arm h on the bolt D, and forces said bolt out, when, by the actionof the spring c and the key on the arm fof the plate A, said plate iscaused to re-engage with the bolt D, preventing said bolt from be- ,iing forced back, except by a suitable key. In 2 unlocking, as will beobvious, the key is i turned in the reverse direction, but actnates ithe plate A' in the same manner before engaging with the arm 1) on thebolt D. i Having thus described my invention, what l I claim as new, anddesire to secure by Letters Patent, isi In a lock constructed ashereinbefoie described, the combination of the plate A, having a tlange,C, lugs a, spring o, and feetf and g, with the bolt l), having groovesb, spring c, and feet h and i, all arranged to operate sub- I stantiallyas and for the purpose described. In testimony that I claim theforegoing as my own invention I affix hereto my signature f in presenceof two witnesses.

y ADOLPH GOLDFINGER. Witnesses:

JOHN C. TUNBRIDGE,

OLIVER DRAKE.

